Cast car-truck side frame



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cAs'r CAR 'rnucz srna puns File'd March 25.

abbot m15 Patented Aug.v 23, 1927.

UNITED STATES PATENT OFFICE.

GEORGE T. JOHNSON AND HARRY W. STERTZBACH, OF COLUMBUS, OHIO, ASSIGNORS TO THE BUCKEYE STEEL CASTINGS COMPANY, OF COLUMBUS, OHIO.

CAST CAR-TRUCK SIDE FRAME.

This invention relates to carI trucks and has special reference to side frames of the type disclosed in Letters Patent No. 1,523,793, granted January 20th, 1925, to

H. WV. Stertzbach and M. R. Hansen, in

which the entire frame, including the journal boxes, is an integral casting and the compression and tension members are in the form of inverted channels extending from the columns to the tops of the ournal boxes.

The object of the present invention is to provide a construction which will tie together the side walls of the compression member' in the refrion of the journal box results from the compression and shearing stresses. The invention is illustrated in the accompanyingr drawing and will be hereinafter fully described and particularly defined.

ln the drawing, Figure l is an elevation of a side frame embodying the present invention;

Figure 2 is a top plan View of the same;

Figure 3 is a section on the line 3-3 of Fig. 2;

Figure 4 is a view similar to Fig. 3 but showing a slightly different form of the central rib.

In the drawing, the referencenumeral 1 indicates one of the columns of the side frame, 2 the compression member, 3 the tension member, and 4 the journal box, the compression and tension members being inverted channels extending from the top and bottom of the column to the top of the journal box. The side walls of the compression and tension members are united with the journal box and the top 5 of the compression member is extended over the top of thejournal although preferably-cut away at its extremity as at 6, to reduce weight. The top plate 7 of the tension member does not extend entirely to the journal box but terminates in an upwardly curved web 8v which follows the edges of the side walls of the compression member in the region of the journal box and unites the walls, said connecting web terminating at Application led March 25, 1926.

and overcome the buckling tendency which A Serial No. 97,340.

the straight edges of said walls which extend to the column l. The side walls of the tension and compression members are thus united in the region of the journal box so that they will effectively resist the tendency to buckle due to the compression and shearing stresses, while the open space at 9 between the journal box and the web 8 is advantageous in accommodating shrinkage in the process of manufacture.

Preferably, a central longitudinal connecting and bracing rib, shown at l0 in Fig. 3 and at ll in Fig. 4, is provided over the inner portion of the top of the journal box to connect the same with the top of the compression member and also with the web 8. The rib l0 has its lower edge arranged to span the space 9 .approximately in the plane of the top of the journal box but the rib 11 is elongated so as to extend down in the space 9 and divide the same, the lower edge of this form of rib being close to the bottom of the tension member. It will be noted that the longer rib ll braces the sides, as well as the top, of the journal box Without destroying the advantageous space 9.

The side walls of the compression member are connected by metal which is an essential element of the frame and not a mere accessory having only the function of a tie.

Having fully described our invention what we claim as new and desire to secure by Letters Patent, is

l. A cast side frame for car trucks having a compression member, a tension member, and a. journal box, the compression and tension members having the form of inverted channels and the topof the tension member merging into an upwardly extending web in the region of the journal box which web extends above the plane of the top of the box and unites the side walls of the compression member and terminates below the top of said member.

2. A cast. side frame for car trucks having a compression member, a tension member, a journal box, a web rising from the top of the tension member and connecting the side Walls of the compression member,

and a rib connecting the journal box with ing the top of the journaLbox with the top the top of the compresslon member and of the compression member and extending 10 with said web. down between and uniting the side of the 3. A east side frame for car trucks havjournal boX and said web. ing a. compression member, a tension mem- In testimony whereof, we-have signed this ber, a. journal box, a. `web rising from the specification. tension member and uniting the side walls GEORGE T. JOHNSON. of the compression member, and a rib unit- HARRY W. STERTZBACH. 

